Knowledge Base · 2026-03-22 · by Cybergate Technology
Yes. With a staged migration, all your existing mail, contacts and calendars are copied into Microsoft 365 before the switch, and mail flow is cut over only once everything is verified - so nothing is lost and there is no downtime.
Plan and verify the domain
Add and verify your domain in Microsoft 365, create the user mailboxes, and confirm licensing before touching any mail.
Copy mail before switching
Use a migration tool to copy mailboxes, contacts and calendars from Gmail/Workspace into Microsoft 365 while the old system keeps running.
Cut over MX records
Once data is copied and verified, point your domain's MX records to Microsoft 365 so new mail flows in. Do a final delta sync to catch anything that arrived during migration.
Configure and train
Set up Outlook on devices, enable MFA, and brief your team. Cybergate performs zero-downtime Gmail-to-Microsoft 365 migrations for Malaysian businesses.
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